Finding the Third Proportional to 300,855 and 660,748.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,855 : 660,748.50 = 660,748.50 : x
2. Step 2: Convert to fraction form
   300,855/660,748.50 = 660,748.50/x
3. Step 3: Cross multiply
   300,855x = 660,748.50 × 660,748.50
4. Step 4: Simplify right side
   300,855x = 436,588,580,252.25
5. Step 5: Solve for x
   x = 436,588,580,252.25/300,855
6. Step 6: Final answer
   x = 1,451,159.46